Bascule-bridge.



A. H. 'SGHBRZEB.

msoum: BRIDGE. APPLIUATIOI YILEL JULY 30, 1907.

Paented 511155, 1910.

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A. H. SGHBBZBR.

BASGULE BRIDGE.

urmornox nun JULY 30, 1901.

- Patented July 5, 1910.

4 IHEETS-BHEET 2.

A. H. SGHBRZER. EASGULE BRIDGE.

AYPLIOA'I'IDB FILED JULY 30, 1907. I 9 3 399 Patented July 5, 1910.

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D [I D 0 DD EDD 2o t D .D D D 0 E000 2Q- tl flesyes: l

BASOULE BRIDGE.

APPLIOATIOI IILSD JULY 30, 1907.

Patented July 5, 1910.

SET 4.

ALBERT H. ESCHERZER. CF CHICAGO, ILLINOIS.

BAscULE-BRIDGE.

Specification 01' Letters Patent.

Application filed July 3 190? Patented J nly 5, 1910. Serial No.386.255.

To all 'uhrim it may concern:

Be it known that I, ALnizn'r H. Scrumznn, a citizen of ihe UnitedStates. and a residcnt. of Chicago, in the county of Cook and State ofIllinois. hnvc invented curtain new and useful lllipl'tn'i'iiitlila inlizisrnlc-llridgc$; and I do here-by declare. that the follmi'ing in afull, clear. and exact description (hereof. refcrcncc being haul to the:iccm'npunying drawings, and to the letters of reference marked thereon,which form a part of this specification.

This invention relates to improvements in buscule or lift bridges ofthat kind whercin tho bridge is opened and clos d by the swingingmovement of :1 movable lcnf or lczivcs in 21 crtirul plane.

The invention consists in the matter-shore- -inuflcr set forth and morepnrticniarly p'oin'n-d out in tho appointed claims.

One of thc ft'illilltn' of in invention is Llll'Ul'ih'Ctl in a showbridge or one which cros i=-- :1 vain-inn oi liiniciy or :11 an anglethcrcto. This i'i-nlin'c of the imcntion consish in 1!. \npportiug pii-rhi -atoll onlsidc of thc ubutzurni or main bridg supports on which thospans i't-st when lifted. and which C-L'Yc to giro cziutiilivcr supportto the swinging bridge loaf, thereby decreasing the li-ngih of theunsupported part of the span when the bridge is (-loscd, withcorresponding incrracm of loud carrying capacity.

fnrthcr feature of tho inwntion resides in tho cumlrnciion and op rationof multiple lczif bridgcs, by which term is ixflflllt cit-hci' pluralityof singlc lcui' spans lo- (:llml dill by sidc. n plurality of doubleloaf spans lr-i'nleil shin by ide or :i. singlr double lcufspan, andarranging ihc ()})tl:lllll 1fmUlut'S and the controlling dcriccslhcrcliir in such rclzition that thc opcriating nnirhim-r of all ofson-rill spams may be opcriited from :i sim'lc controller house. 'iwntho brid c leaves ill' i loci lcd Hltll by sidc they may no upcrntcil io(lPL'll or clowsiinultuncously or progr snircly 21 dcsizcil.

A further fraturc of the invention resides in the machinery whichoperates to open and hm the bridge :llnl is driven by a mo- I'm l'n'iliiti on n. stationar npprouch or olhvr st'itinnzujr strut-lure.

A further lciitnrc of my invention rcsidcs in tho Chlbli'lltliflh of thecouutrrivcight by which the bridge structure is rounlcrln-l- Mllittl,thc said counterweight lacing r opstructcd and arranged as toconstiiuteincuns for rcinforcingand strengthening the bridge .wu'ncturcin addition to its usual function of countcrbziluncing the structure.

A further feature of the invention resides 50 in the (instruction of thecounterweight whereby the same consists of a metal structure orlUQlOrZUlQ provided with :1. filling of. roncrctc or plnetic nuiterial.

A .sill further feature of the inventionss resides in r inforcing therolling sc ments by which ihe bridge leaf is supporte with concrete orplastic material.

I have shown my invention as applied to a double leaf bridge arrangedobliquely of the waterway and a heroin each complete bridge comprisestwo leaves which meet at their front ends between the supporting piersor abntmcnts.

Features of my invention relating top. bridigc which is supportedoutside of the usual abutment by 11 pier arranged outside of theabutment or nniin support for the swingingleaf arc Cz'lfllflilllyapplicable to double lczif nkCW brit gen such as is shown in thedrawings, but are also applicable to thc type of skew bridge comprisinga single lczii' which is snpportcd at its rear or 21pproiich cnd uponthe usual abutment or main support and atits front. end upon a stat-ion111') pier or upon a stationary approach span, as the case may be.

Other features of my invention are npplicubic to either ordinary or skewbridges.

My improvements 2\. hcrcin shown are applied to that. typo of busculebridge known in; :1 r lling lift bridge, but certain of the improvementsmay be zuhiptcd to other types of liner-rile bridgis.

As shown in the accompanying draw ingsz l ignrc t is a top plan view oftwe doublc loaf bridges locz ted sidc by side. Fig. 2 is a sideelevation thcreof. Fig. 3? is a side elevation of the rear end of thebridge showing): the opcrating machinery and on supports which carry thesome. Fig. 4 is a fragmentary top plan view of the operatin .1machinery. Fig. 5 is a section taken throngli the rolling segment. andits support ing ,gi rdcr. showing that. pmtion of the nmchincry which isinoixntod on tho sogincnt. l igi \3 is n scctioniil View lain-n on lino5 -13 of Fig.

5. Fig. 7 is a roar elevation of om. of ihe bridge loin-es howin; one.ipprmwl construrtion in thc c1iuntcrwcight. F' section taken on line8-5 of F 7 is a view similar to Fig. SllOWlllg lnQliltied form ofcounterweight. Fig. i a vertical section taken on line 10-40 of 1 2g.

.9. Fig. 11 is a section taken through the illustrating a form of centerlock for loclv ing the bridge leaves together. Fig. 14 is a sectiontaken on line 14-1-1 of Fig. 13. Fig.

15 is a diagram illustrating the manner of wiringclect-ric motors whichoperate the bridge soas to control the meters from a single controllerstation. Figs. 16 and l? are sectional views showing modified forms ofconstruction in the rolling segment and track girder.

As shown in the said drawings, A A designate the separate leaves of thebridges, all

of which are alike. Each leaf comprises upper and lower chords a a and afies: striicture A located substantially at the level of the lowerchords. The bridge illustrated is a railway bridge, the track railsbeing supported on cross ties that rest on stringers a a constitutingpart of the floor structure.

B B designate rolling segments arran ed in the plane of the side trussesof thebridge, at the. approach or rear end of each leaf. Said segmentsrest and roll on tracks a carried by horizontal girders C C, which arehereinafter termed track girders. 'The said track girders are supportedat their ends on piers D D located at the'shore of the waterway. Thesaid track girders are provided with means for preventing slipping orshiftof the segments thereon, said means com-- prising teeth N, (Fig. 3)arranged along the 'rders and holes or recesses b m the curved aces 0fthe segments (Figs. 7 and 9) adapted to receive such teeth.

E E designate counterweights which are attached to bridge trusses abovethe segments B, and extend from the upper ends of said segments torearward extensions of the upper chords of the said trusses. Saidcounterweights E serve. to counterbalance the span, in the usual manner,so as to ermit the raising and lowering of the bridgz leaves withminimum power.

It will be noted from an= inspection of Fi 1 that the track girders C Care ar-' ran ed parallel with the bridge trusses or roa way of thebridge; this being in fact essential in a rolling lift brid e. By reasonof this disposition of the tlflci girders they stand obliquely to theshore lines of the waterway and the outermost piers D D, which supportthe outer ends of each pair of track girdeih, as shown in said Fi 1, arelocated, one on the shoreinside of the shore line, indicated by F, andthe other out.- side-of theshore line, but inside the line of thenavigable channel, indicated by the dotted line F In any instance ofthis kind.

.one of the piers will necessarily be located nearer than the other tothe channel of the watew'ay, -nd it therefore becomes possible,'ltllflut eucroacluueut on said channel, to place another pier.indicated by G, outside of the shore line and in longitudinal aliucmentwith the pier l) which is located inside of the shore line. Said pierUr, thus located, is adapted to support the leaf, when in its horizontalor closed position, by contact therewith of the leaf truss at the sideof the leaf at which said pier is located. As shown in said Fig. l, thepier G is located just inside of the line F and in position to directlysupport the said leaf at the. side of the latter adjacent to the pier Dwhich is located on the shore.

It will be observed that both leaves of each bridge are supported at oneside by one of the piers G and that the piers associated with the twolea es of the bridge are located at opposite sides of the bridge. Thetwo leaves of the span will, in acco nce with the usual practice, belocked together at their meeting ends by a locking device adapted tohold the same from relative vertical movement, so that when the bridgeis closed the two lea es are supported not only by the main supports ortrack girders by which the leaves are sustained when raised, but also bythe said piers G located in each instance at a distance outside of saidmain supports or track girders. bridge as a whole is therebysubstantially decreased, its unsupported part being equal in length tothe. distance between the two piers- G 4}. thereby giving to the bridgean increased load bearing capacity. In another aspect the constructiondescribed embracing the auxiliary piers G G, may be termed amodifiedcantaliver form of bridge, it being seen that one of the side trusses ofeach leaf is supported at two points, to-wit, at the point at which itsrolling segment rests on its track girder and at the point at which thesaid truss rests on the pier G, 50 that the outer end of the truss sosupported cannot be depressed without rockin the same upon the said pierG. with the e ect of lifting the rear end of the leaf. Any such liftingof the rear end of the leaf will be prevented by the weight of the spaninside of said pier 9, together with the counterbalance weights thereonlocated and also by the anchored stops usually employed in bridges ofthis class to limit the u ward movement of the rear end of the lea andthe descent of its frontend. This feature of an auxiliar supporting pierlocated outside of the traclz gut are or main support on which theswing-- ing lea'f rests when lifted, and adapted to support the leaf inthe manner described when the same 15 in its closed position may beapplied with advantage in some instances to other kinds of basculcbridges, it bein manifest that the general effect of such an Theeffective span of the auxiliary supporting pier will be the same 5whether it. be used to support one of the i trusses only or a leaf(attending obliquely to i the waterway, or both trusses of a leafarranged at; right un les to the waterway such as is shown in l ig. 1:2.Such an auxilmry pier, however, has special advantages in connectionwith the obliquely arranged or skew bridge illustrated. because in sucha bridge the total distance between the outer supporting piers for thetrack girders may be so arranged as not to enttroach upon the Waterway,while the auxiliary supporting ier, when located beneath one onl of theleaf trusses, as hereinhefore described, may be located at aconsiderable distance from the shore line ot the waterway, withoutencroaching upon the latter.

.fonn of lock. briefly described, comprises an -'upper and a lowerextension H, ll. respec- I'l enters the space lietwecn tlvely, carriedby and extending forwardly from one of the leaves. The upper lockingextension is made shorter. than the lower one. and said extensions areseparated by a notch or recess /1. The companion leaf of the span isprovided with a horizontal loclting extension H which is fixed to uprihtparallel plates or webs la la extending orwardly from said leaf, andsaid J m-king cxtension H when the leaves occupy their closed position,enters the notch between the extensions ll H, while the lower extensionthe laterally separated platcu It ll. The extcnzion H is shortenough topcrmit. said locking" men!- her ll to saving iulo thc notch Iiduringzlhe cl sing nmvcnwutot' the leaves. ivhile the l nger extrusion Hlimits the downward movement. of the leaf carrying the hit-king nuauhcrll and guidcs the latter iuto the uot 'h as the leaves approzugh theirclosed piisiliou. The l cking iucluhers or projection. it ll are svcurmlto a transverse "irder H". which extends across the front eiiils of theHour structum of the leaf can-ring the same. while the plates h of thelock memher ll are likewise ecured to the transverse "i'n'lcr H f tin-'rther leaf, the parts being {i am in longitudinal hcams 1/ 11, of theleaf Shmltllfis by bracing ua-ml-crs i z ll will be under tood that saidlo king lncmlwt'iarc lhcglul adjacent to the planes ol' the ll'IlP-Hl'w'at the low-. 2" chords thereof. th y. living two pairs of such lockingdevices usually appli d to each two leaf span. i

it will he fur hermore ohsorved that the ed to perform an importantfunction in c0nne.:tion with a two lcat' bridge having" the auxiliarysupporting piers G (l hereiuhefore described. This will be uudci-stooilby consideration of the fact that the projections ll ll of each lockin;member are applied to the ends of the truss of each leaf, which issupported on the pier it. so that the lower extension H constitutes ahorizontal surport for the locking member ll tiscd io th truss at thesame side of th: othe leaf. which latter truss is non'supportediJLlWtzii its ends. The said locking device il crcfm'e constitutts aconnection lie-tween said leaves,

which sustains both the live and dead loads-so on the trusses which areunsupported he" tween their ends. By reason of the fact, therefore. thatthe two oppositely disposed trusses of. each pair of leaves are SHPPOllHbetween their ends by the auxiliary piers (fr 8 and carry at their outerends the supporting extensions H of the center locks. and thatthe othertwo trusses of said leaves are' supported at their outer ends by saidlower extensions ll. the span as aivhole, when the leaves thereof arelockod-together. constitute a continua: structure supported at; its endsand sustained at two points intcrmediate to its ends by said auxiliarypiers.

The stress due to the live load on the trussrs which are unsupportedbetween their ends is transmitted through the locking connectiondescribed to the inn r ends of the trusses which are supported betweentheir eudshy said piers (l. The load on the ends of the trusses whichare supported by said piers tends to depress the outer and elevate therear ends of said truss s. but the weight of the leaf structures in rearof said auxiliary piers is. however. so proportioned that it will neverbe overlmlanccd by any normal live loadbrought thereon.

Rcl'crring next to the mechanism for operating the bridge to open andclose the same.

said operating devices ar made as follows:

The said operating device is of the gcu ral typo shoun in the prior ll.h. Letters Patent to Kcllar No. 752.5%. and embraces tixeal hm izontalrack bars I I. located om. at each side of'and exterior to the planes oftiH'l'.

truss of each leaf. which ariengaged l 'vgea pinions .l mounted on theumvahhl; and operated by driving conuectimis her inafter to hedescribed. The said'rack bars 3' are mounted on stationary horizontal id 1 attached at thcir ends to columns 1- I that are anchored in thepiers D, the l'raznc cou posed of the said uuuahcrs ll" l lwiug: ln'accdh i-lwliqu struts l". The feature f my intention associated with thiscon lIlltllOll relalrs lo mechanism for driving the pinion J from all1()i1ll'.2!i 'lilililltlSliln tionary part of the bridge structure.

The llI'iYlHjj machiiu-ry and the means f r locking ClQVFLQSUHlLlEasdcscribedareadaptconnecting the same with the motor are: g

second bracket K attached to the same side of the track girder. Thegearing connecting the motor shaft in with the sleeve K consists ofbevel gears, of which the one attached to the outer end of said sleeveis indicated by 1G in Figs. 3 and 5 and the one on said shaftby if inFig. 3. Said hollow shaft K" is provided at its inner end with a pinionK which meshes with a gear wheel If aftixed to a sleeve K which hasendwise sliding splined connection with a shaft K, which is mounted atits upper end on the bridge leaf and is adapted for oscillatory movementin a vertical plane. The splined connection between said sleeve K andthe shaft K operates to transmit motion from the sleeve to said shaft,while permitting the shaft to slide endwise in the sleeve. The sleeve Kis adapted to swing or oscillate in the same vertical plane with theshaft K, being mounted in a bearing k attached to the inner end of ashaft K that extends through and nas bearing in said hollow shaft K,(Fig. 5). Said bearing kflby the turning of said shaft K, is adapted tooscillate on a horizontal axis at right angles to the plane in which theshaft K gand sleeve K have oscillatory movement. Thesaid shaft K isprovided atits upper end with a beveled pinion 1; that meshes with anidler gear wheel In which is rotatively mounted on a horizontal stud kfixed to and extending late ally from the rolling segment B. The upperend.of the shaft K has bearing in a hanger/c which is provided with ahub which surrounds the stud 7; outside of the idler gear Is Said hangeris thereby adapt ed to swing on a horizontal axis, thus permitting thelower end of the shaft K to swing or oscillate in a vertical planeonthe.

bridge leaf. The idler gear wheel k meshes with a pinion L which isaffixed to the lower end of a connecting shaft L having hearing at itslower end in a bearing bracketl fixed to the lateral face of the rollingsegment B. Said shaft L has hearing at its upper end a bracket Z (Figs.3 and 4) attached to' one of two horizontally arranged, machinerysupporting frame members A A on the truss of the bridge lea Said upperend of the shaft L is provided with a pinion Z which meshes with a gearpinion Z fixed to a transverse, horizontal shaft if rotatively mountedon longitudinal, machinery supportingmembers A A on the tr: .ssstructure (Fig. 4). The said shaft L carries a. gear wheel Z which tmeshes with a gear wheel Z on a counter I shaft L mounted in saidmachinery supporting members A A and provided at its ends with gearpinions Z Z which mesh with gear wheels Z Z atlixed to the inner ends ofshort rotative stub shafts I L mounted on the leaf trusses, and shown asextending through and having bearing in the truss uprights A* A. Saidshafts L L* are provided at their outer ends with rigidly attached gearpinions J which have meshing engagement with the racks I I carried bythe stationary operating struts I I. The shaft L and eountershaft L areprovided, in addition to the gear pinions Z and wheels Z, with a gearpinion Z and gear wheel Z differing in diameter from the pinion l andwheel Z, the gear wheels Z and Z being adjustable longitudinally of theshaftso that either may be brought into use to vary the speed of thedriving mechanism, in a familiar manner. i

All parts of the dri ing machinery describe above the pinion L of theshaft L, are mounted in fixed relation to the bridge leaf audits rollingsegine'nt. Inasmuch as the shafts K and hunger 15 are mounted so'as tobe capable of cscillatory motion on the stud k and the shaft K isadapted to slide through the oscillatory, rotative sleeve K it followsthat during the rolling move ment of thesegment B and the bridge leaf,as the pivotal s51 sort of said shaftthe stud k approaches toward andrecedes from said sleeve, the shaft K slides through the said sleeve KThis mechanism permits the driving machinery mounted on the movable leafto be positively driven through the medium of drivinggears and shaftswhile at the same time giving the necessary flexibility in theconnections between the stationary and movable parts of the drivingmechanism.

It will be observed that the sleeve K havingsplined engagement with theshaft K,

said sleeve and shaft constitute in effect two 'a manner permitting themto swing or oscillate on parallel, horizontal axes; one of said bearingsbeing so pivotally supported on the bridge approach and the other uponthe.

bridge span. That is to say the pivotaliy supported bearing k for thesleeve K is."

sustained by the horizontal shaft K, which, being free to turn or rotateon a horizontal axis, enables the said sleeve to swing in a verticalplane arallel with the plane of movement of t e bridge span. while thebearing for the shaft K, which is formed by the hanger It, is adapted toswing freely about the horizontal pivot stud 6 thorcoy permitting thesaid shaft to swing freely in the some vertical plane with said sleeve.Mnniiestly, the particular arrangement of those parts illustrated neednot be adhered to i camping out :ny'invcni'ion. the essentiol featurebeing that the operative rennet tions between the rotative driving;shaft. on the bridge approach and the rotzitire operuting shuft. J onthe swinging leaf shall enibincetwo relatively slialin ,rotntive membershave spliLed conn ction with each other (92s for instance the shaftli"and the sleeve li), said. memhers being severally mounted in hearings onthe leaf and approach, which bearings are adapted to turn or swing uhoutparal el. horizontal uses, and one of said members hating operativeConnection with said driving shaft and the. other member with theoperating shaft. on the bridge leaf. The driving connections, betweenthe said relatively sliding members and the parts which drive and aredriven are adopted for operation at all points in the oscillatory orswinging movement of said members about the pivotal axes of theirhearings. The driving connections referred to. in the con: siructionillustrated, are afi'ordcd by the gear pinion k which intermeshes withthe gear pinion .l" on said sleeve and which. he-

' g concentric with the pivotal axis of the bearing Ir of said sleeve,maintains the necessary driving connection in all angular positions ofsaid sleeveyand likewise such driving connections between the shaft Kand the shaft, L includes the idler gear wheel which interzneshes withthe gear pinions k and L on said shafts and which, being concentric withthe pivotal axis of the hunger Ir, maintains driving connection with theshaft If" in all angular positions of said shaft.

If the operating machinery for the bridge leaf be adapted for operating.a single leaf bridge, the motor therefor may be located in a controllerhouse or station and suitably geared to the operating muchiner of thebridge leaf, or it may be located in any suitable mann r on thestationary part of the bridge structure and geared to the operatingmachinery. if the motor he a gasoleno motor or a steam engine andoperates through the mechanism described to rniseuud lower the bridge.it may be desirable to locate said motor in the controller house. whichlHHIHU may be located in HP) suitable position on :i g stationary partof the bridge hll'lllllll'? or the i 1 :isit shortens the time duringwhich a parshore.

In accordance. with one feature of my inf ventior. I provide a multiplecontrol systeui or mums for operating :1 plurality of i of d uble leafbridges located side by side, T-l lll(- two leaves of a lwodcaf, singlespun bridge, in cases in which it is necessary to locate the operatingmotors one it each end of the in-idge. When the multiple control svsiein is cinphn'ed for operating a number of sin 'le-lcnf bridgesltxziitcd side by side, and with the rear ends thereof l cated on thesome side of the. Waterway or bridged space, all of the said leaves maybe operated from a single motor geared in any suitable manner to theoperating niz-ichinery of the several leaves, or each of the. leaves maybe pro vidvrl with its own electric motor and a controlling circuitemplovcd, which is arranged to extend from the se'ierul motors to :1single controlling house or station. When operating a two leaf singlespun bridge. it is preferable to provide the two leaves on the oppositeshores of the waterway each with on actuating motor and to connect saidmotors with me controller house by conducting wire and this practicewill also be followed for operating s number of spans located side byside, each consisting of two leaves and having two operatingmotors'locuted one on each shore of the Wata say.

Obviously my multiple control system may he applied to any type ofoperating machinery. In the construction illustrated each operatingmotor P is supported on one of the track giri'iers associated with theleaf which it designed to operate. In Fig. 15 T have shown indicateddiagrammatically the-manner of connecting the several motors with :2central controller station. -As shown in said figure. N designates thecontroller station or house. Four motors P P P P re indicateddiagrammatically in said Fig. 15 which shows an arrangement. foroperating two bridges each having two leaves such. as are illustrated inFigs. 1 and 2. Said m0 tors are connected by feed wires p p p p withilio controller house or station, and the two motors on each side of thewaterway are connected by common return wires 77* p with said controllerstation. The controlling mechanism located at the controller st: ion maybe of any suitableor preferred form and may be operated to start all ofthe motors at once to simultaneously lift or lower all of the leaves ofthe bridges, or may he operated to progressively open or close.

the several bridges. \Vhere :1 num-her of bridges are located side byside. the latter mms'lrm'l nn is a desirable one especially when thebridge lrufiic is heavy, inasmuch ticulur bridge is required to beopened, it being unnecessary to hold all the bridges open until :1 mathas passed the lust bridge oia series nnd conversely it not living requie-d to open a given bridge of a seriPS 3 until the boat has reached thatbridge.

My inv ntion includes improved features of construction in thecountc'rweights with which bascule bridges are usually provided for thepurpose of countw ihincing the same.

First, referring to the general arrangement of the counterweight, thesame, as shown in Figs. 1, :3, 3, 9, 1) and 12 of the drawings, consistsof a transversely arranged counterweight E which is attached to the rearends of and extends between the trusses, and occupies atits ends thespacesv between the upper ends of the rolling segments and rearextensions of the upper chords of the trusses.

In Figs. 7 and 8 are shown two vertically arranged counterweightsections E 15 which are located in the planes of the trusses between theupper ends of the rolling segments and the upper chords. I Thetransverse. counterweight E affords a transverse brace by which thetrusses are rigidly connected with each other at their rear ends. Thebridge illustrated being a through bridge, said transverse counterweightid is located at a height above the bridge floor sntlieient for thepassage of traflic beneath it.

As a further improvement in the-co'nstructiou of a counterweight, myinvention includes the idea of a metal supporting member, reinforced andstrengthened by a filling or body of concrete or like material adaptedto be applied or inserted in a plastic State and allowed to harden; thecomposite structure of metal and concrete adording the necessarywcightand at the same time possessing the strength and rigidity necessaryforvits purpose.

Both the lateral and transverse counterweights 15 and E referred toconsist of box-like structures of metal, ri idly con neeted with thespan trusses and provided with fillings of concrete. This constructionin a counterweight has the general advantage of providing the necessaryweight. with the use of materials niuc cheaper than metal, while at thesame time the inclosurc may be made relatively light in structureand theconcrete filling when introduced therein in a plastic state and allowedto her; den, is adapted to give stitl'ncss iind rigidity" t0-thecounterweight structures.

Fig. 7 shows in end View lateral counterwcights E E located in the.planes of thetrusscs. The trusses in this instance are connected by atransverse frame E extending between the said countcrweights. Eachcounterweight E as shown in the sectional view Fig. 8, consists of abox-like inclosure of slim-t metal, comprising side plates 6 e andmarginal plates 0" The box like in-' closure thus formed is secured tothe uppcr end of the r lling segment, and to the rearward extension ofthe upper truss chord, in

any suitable manner. The said side plates e e are connected with eachother by transverse bolts 0 acting to prevent the spreadin apart oi" thesaid side plates when the inciosurcs are filled with cement or concretein a plastic condition. \Vllen completed the space within the box istilled with a solid ,hody of cement or like material-which retains itsshape and serves to give rigidity to the inclosure.

In Figs. 2) and IQ is shown a counterweight l) which extendstransversely between the trusses of the bridge, and also occupies theplanes of the trusses; the counterweight structure'in this instanceserving to afford a rigid connection between the two trusses. As shown nsaid l igs. 9 and 10, the counterweight comprises a box-likc str'iictureembracing front and rear Wtlllri a if, top and bottom walls a c", andend plates 0" a" (one of wlnch.is shown in Fig.

5)) located in the planes of the outer faces of the trusses. Anglo bars0 0", employed to give rigidity to the end portions of the.counterwciglitstructure and to ati'ord a sufticiently rigid connectionbetween the rolling segments and the upper chords of the truss, areshown as extending through the ends of the inclosure,

Tie rods 0* extend horizontally through the counterweight from end toend thereof, other tie rods 0 and e extend vertical y and horizontallythrough the same, 'Ai tie rods being attached at their ends to thf boxwalls. Said tie rods hold the walls from spreading and serve tostrengthen the body of concrete in which they are embedded. Thecounterweight llltld as described may be easily and cheaply constructed,the metal structure being completed and the cement or concrete insertedtherein in a plastic condition, and then allowed to harden.

The counterweight is preferably provided with one or more pockets E(Fig. 10) which are designed to receive additional counterweightmaterial in order to effect final counterbalanced adjustment of thebridge leaf. The said pockets E E are shown provided with a. coveringplate 9 constituting part of the front wall of the box. The plate e ismade removable, being held in place by retaining bars 0 e engaging theupper and lower min-"ins thereof, and fastened to the front wall of thecounterweight'box in any suitable manner. Y

As a further improvement in a rolling lift bascule bridge, I make therolling segments thereof of a metal member reinforced or strengthened bya body of cement or con- .crete which is a plied to the metal member inaplastic con ition. The cement or concrete; as applied to the metal partoi the segment not only serves to make the same stronger and more rigid,but also acts as a counterbalancing weight bringing the cen- ".nzrvedplate 71 which constitutes the lower -member of the I beam and isconvexly tied together and to the web If by means of track girder C intransverse section, said -to more securely hold the masses of concrete renmg the said masses Zr 71'' of concrete and the bolts b" 72.

sesame 7 for of gravity of the leaf nearer its rear end. The metalmember or frame of a rolliilg segment to which cement or concrete is soapplied may be made of any desired form or structure.

In Figs. and 11. I have shown in cross section a hollow or box form ofrolling segment,-lhe interior of which is filled with a body of cementor concrete 7;. The main part or body of said segment struererrecornprises parallel, vertical side. plates 5 b, an upper plate 7): and aconvexly curved lower or hearing plate 71. The side walls of saidsegment are shown as tied together by bolts or rods 11 5 extendingthrough and embedded in the concrete body.

In Fig. 15 I have shown a somewhat differcnt form of rolling segment,embracing a metal n'icmber reinforced by cement or concrete. In thisinstance the rolling segment is, in its cross sectional form, like an Ibeam, having the lateral spaces at the sides of its central web filledwith masses b1" of cement or concrete. The main frame or body of thesegment structure comprises a central, vertical plate or web an uppermarginal plate or member Z1 and a convexly curved and forms the curvedbearing mem; ber of the rolling segment. The connection between the web7;" and plates 2) a d I) is shown as formed and reinforced by additionalplates and angle bars in a familiar manner. r

The masses 7)? 7) of concrete are shown as bolts or tie .rods 71",inserted transversely through the web 1'". Flat plates or washers 1) 72nrc shown as embedded in the. outer faces of the masses of concrete bI), and provided with holes through which the ends of the bolts 7: 7:pass: said plates serving to the metal frame of the segment. As anadditional means of reinforcing or strengthholding the same on the metalframe of the segment, I have shown tie rods 71" I) as extending throughthe said masses of concrete, parallel with the web 7) and transverse toAs a still further improvement in bridges of the character described. inwhich the snpporting tracks for the rolling, segments are formed bytrack girders, I make said track girders of metal members, reinforced orsaid Fig. 5, is formed by the track plate a which. as hereinbeforedescribed, constitutes the upper longitudinal member of said trackgirder, two parallel vertical side plates t and a bottom longitudinalmember (1, It is to be understood, however, that the track girderreinforced or strengthened by the ca ment or concrete as set forth maybe variously formed or constructed. For instance. instead of box formsof girder shown in Fig. 5, an. I beam form of girder may be em loyed,such as is shown'in cross section in *ig. 1?. ln-this instance the trackgirder consists generally of the track plate 0 which forms the from;longitudinal member of the members c and The said web or plate I isconnected with the top and bottom plates 0 c" by connecting andreinforcing plates and angle bars, as illustrated in said Fig. 17. .iThes aces between the plates 0 0" at the sides 0 filled by masses 0 2 ofcement or concrete which are heldin plaa and firmly secured to the metalbody of the irrler by means of a plurality of transverse y arrangedbolts or t e rodsc c which pass at their ends through and areengdged-with vcrlicai bars c" c which extend along the outer facts ofthe said massezalc c of. cement or concrete; The said bolts or tie rddsc 0 pass tbroiinh holes in the central plate or web 0". T .e metal bodyof'the girder together with the tie rods or plates c" and the uprightbars 0 c in this instance constitute a metal frame to which the cementor concrete is applied when in a plastic condition and which, with themass of cement or concrete, forms a composite structure afi'ording atrack girder having a hi h degree of strength and ri gidity and a sogreat durability because the metal body of the girder is toaconsiderablc extent protected from rust or corrosion by the cement orconcrete applied thereto.

The features of construction relating to the center lock, shown anddescribed, constitute the subject-matter of a divisional application.Serial Number 529,845, filed No vember 26th,'l909. y

I claim-- 1. In a skew bascule bridge, the combina strengthened bycement or concrete applied ,snstained at. their rear ends, auxiliarypiers thereto. 7

As illustrated in Fig. 5, which shows the track girder is made of hollowor box form and its interior is filled by a mass or body c of cement orconcrete. The metal member of said track girder, as illustrated in onefor each leaf, located one at one side am the other at the opposite sideof the bridge, and imposition to engage the leaves when closed at ointsbetween the rear and for ward .ends of the same. and locking means attbc'mectingcnds of said leaves,

2. In a skew lmscnle bridge, the combinkthe web or vertical plate. 0*are l lo tion of two swinging leaves, each comprising two longitudinaltrusses, and rolling segments attached to the rear ends of said trusses,main supporting tracks in which said segments rest and roll, auxiliarypiers located one at one side and the. other at the other side ofthebridge in position for onga ement with one truss of each leaf at aoint between the ends of said truss, and ockin means for connecting themeeting ends of said leaves.

3. In a skew bascule bridge, the combination of two swinging leaves eachcomprising two longitudinal trusses, main supports on which said leavesare niovably supported at their rear ends,, and two auxiliary supportingpiers, located one at one side and the other at the other side of thebridge, in position to engage one of the trusses of each leaf whenclosed at points between the ends of said trusses, each of said trusseswhich engages and is supported by an auxiliary pier having on itsforward end a locking projection adapted for sustaining engagement withthe forward end of the truss of the other leafwhich is unsupported by anauxiliary pier.

4. In a rolling lift bascule bridge, the

combination with a swinging bridge leaf, of

actuating mechanism therefor comprising an operating shaft on the leaf,through which rising and falling movement is given to the leaf, arotativc driving shaft mounted on a stationary support, and drivingconnections between said drivin shaft and the operatin r shaft on theleaf: comprising a shaft 81K sleeve having splined connections with eachother, and oscillatory bearings for said shaft and sleeve 5. In arolling lift bascule bridge, the combination with a bridge leaf ofactuating mechanism therefor, comprising a rotative operating shaft onthe leaf, a rotative driving shaft mounted in stationary bearings,driving connections between said drivin and operating shafts embracing ashaft an sleeve having .splined connection with each other, said shaftand sleeve having bearings mounted to turn on parallel horizontal axes,and gearing connecting said driving and operating shafts with said shaftand sleeve, said gearing embracing gear wheels on the shaft and sleeveand gear wheels mounted concentrically with the said horizontal axes ofthe bearings.

6. In a rolling lift bascnle bridge, actuatin mechanism for the bridgeleaf comprising a driving shaft mounted in stationary bearings, anoperating shaft mounted on the leaf and driving connections between saidshafts comprising a shaft and sleeve having splined connection with eachother,

bearings for said shaft and sleeve, mounted one on the leaf and theother on a stationary support, said bearings being adapted to I swing onhorizontal axes and in the same vertical plane.

7. In a rolling lift bascule bridge. actuating mechanism for the bridgeleaf comprising a driving shaft mounted in stationl ary bearings, anoperating shaft mounted on the leaf, and driving connections betweensaid shafts comprising a shaft and a sleeve having splincd connectionwith each other, oscillatory bearings for said members, mounted one onthe leaf and the other in a stationary support, said bearings beingadapted to swing on horizontal ax s and in the same vertical plane, anddriving con- 1 nections between said driving and operating shafts, andthe said shaft and sleeve, comprising bevel gear wheels mounted to turnon horizontal axes concentric with the axes of rotation of the saidbearings and bevel gear wheels affixed to said shaft and sleeve.

8. In a rolling lift bascule bridge actuating mechanism for the bridgeleaf comprising a shaft and a sleeve having splined connection with eachothcr,oscilhitory bearings for aid shaft and sleeve mounted on thebridge leaf and on a 'stationarypart and adapted to swing on horizontalaxes, a horizontal shaft supporting the bearing for said sleeve, beveledgear wheels on said sleeve and shaft, a beveled gear wheel mounted onthe bridge leaf, concentric with the pivotal axis of the oscillatoryshaft bearing, a horizontal hollow shaft mounted in stationary bearingsand surrounding the shaft which supports the said sleeve bearing, abeveled gear wheel on said hollow shaft intermeshing with the beveledgear wheel on said sleeve, drivin connections between said driving shaftand said hollow shaft and driving connections between said beveled gearpinion on the bridge leaf and said operating shaft on the leaf.

9. In a rolling lift bascule bridge, the combination with a bridge leaf,of actuating means for the leaf comprising a. driving shaft mounted instationary bearings, an operating shaft on the leaf, an oscillatoryshaft and sleeve having splined connectionwith each other, anoscillatory hanger provided with a bearing for the said oscillatoryshaft, a horizontal pivot stud on the bridge leaf afi'ordi11 g pivotalsupport for shaft, a beveled idler gear pinion mounted on said pivotsicd and inter-meshing with that on the oscillitory shaft, a, connectingshaft located on the bridge leaf in the same vertical plane with theoscillatory shaft, .a pinion on said connecting shaft intermeshing withthe idler gear wheel, an oscillatory bearing for said sleeve mounted toturn on a horizontal axis, a beveled gear pinion on said sleeve. abeveled gear wheel mounted concentrically with said oscillatory sleevebearing, and driving connections between said hangcr,a gear pinion onsaid oscillatorysaid last named gear wheel and said driving on thebridge leaf for said oscillatory shaft, a connecting shaft mounted onthe bridge leaf in the same plane with said 05- cillating'shaft, beveledgevr wheels on the adjacent ends of said oscillatin shaft and connectingshaft, an idle: beveled gear wheel 5 rolling segments consisting ofhollow melal on the bridge leaf mounted concentrically with siidoscillating shaft bearing and in terrrzeshing with the gear wheels onthe oscillatory and connecting shafts, a, horizontal hollow shaftmounted in stationary bearings and having operative connection with thedriven shaft, :1- horizontal shaft mounted in said hollow shaft, anoscillatory bearing for said sleeve attached to said horizontal shaftand internieshing beveled g -r wheels on said hollow shaft and sleeves.

ll. in a bascule bridge, a swinging bridge leaf embracing a floor frame,two longitudinal trusses vhich extend above the floor frame, and acounterweight extending transversely between the upper parts of thetrusses and constituting an overhead brace for rigidly connecting theupper parts of said trusses; said counterweight consisting of a box-like'mctal member rigidl attached atits ends to the trusses, and a fillingof concrete inserted in a plastic stoic into said bo:-:lilte member andforming therewith a rigid, composite structure. 4

12. In a bascule bridgo,.a swinging bridge leaf provided with rollingsegnicnts, said rolling segments consisting of a metal frame or body,tie rods or bolts connected with the same, and a filling of cement orconcrete. l

13. In a bascnle bridge, a swinging bri lge leaf provided with rollingsegments, constructed of metal reinforced by cement or concrete. i

14. In a hascule bridge, a swinging bridge leaf provided with rollingsegments, said inclosures provided with a filling of cement or concrete.

15. In a bascule bridge, a swinging bridgeleaf provided with rollingsegments, said rolling segments consisting of metal inclosures providedwith tie rods extending therethrough, and a filling of cement orconcrete.

In testimony that I claim the foregoing as my invention I aflix mysignature in the presence of two witnesses, this 1st day of July A. D.1907.

ALBERT H. SCHERZER.

' Witnesses;

G. R. Wrnnrns, D. E. Mention.

